Common thermoplastic polymers such as polystyrene and PVC can be _______ as often as they are reheated. A) hardened B) shortened C) softened D) strengthened

1 answer
Question:

Common thermoplastic polymers such as polystyrene and PVC can be _______ as often as they are reheated. A) hardened B) shortened C) softened D) strengthened

Answers

The answer is A) hardened

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